Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eba76afc5e796ea38338ee436a76f004ab6a2eb336cb4c6a9aadec59b8a02949' 
  AND token = '5y0xJ2BL+TfOz5AY0OuPV3tYhfUte66hgW4yjThkTiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}